El temor a las serpientes y/o a las arañas, son una de los dos fobias más comunes reportados. Para aquellos que sufren de ellas, la víbora cola de araña (Pseudocerastes urarachnoides) debe parecer una pesadilla encarnada. Fue encontrada por primera vez en 1960, en el desierto del oeste de Irán. Por la rareza de la cola y la falta de otros especímenes, se supuso que se trataba de un tumor o alguna otra malformación. Fue sólo con el descubrimiento de otras víboras araña de cola que los científicos se dieron cuenta de que era una especie desconocida y descrita en 2006. La hipótesis de que la punta de la cola, cumple funciones de señuelo para atraer potenciales presas ha sido apoyada por observaciones de laboratorio. Cuando una pollo fue introducido en el mismo recinto que la víbora, esta comenzó a hacer vibrar el adorno de la cola. Después de media hora el pollo se acercó a la araña y comenzó a picotearla. La serpiente acerco su cola hacia la ca...See More The fear of snakes or spiders, are one of the two most common phobias reported. For those who suffer from them, spider tail Viper (Pseudocerastes urarachnoides) should look like a nightmare incarnate. It was found for the first time in 1960, in the desert of Western Iran. By the rarity of the tail and the lack of other specimens, it was assumed that it was a tumor or any other malformation. It was only with the discovery of other snakes spiders tail that scientists realized that was an unknown species described in 2006. The hypothesis that the tip of the tail, functions of lure to attract potential prey has been supported by laboratory observations. When a chicken was introduced in the same enclosure as the Viper, this began to make vibrate the tail motif. After half an hour the chicken approached the spider and began to Peck her. The serpent approached its tail towards the head while chicken continued harassing the false spider, finally the snake bit the chicken which died an hour later. A further observation with a Sparrow got the same result (although this time the snake exhibited to lure right in front of your head. Lure in the queue (or flow) are common among snakes, but rarely are so elaborate. In general, the attraction is not more than a fine point that moves like a worm (as in the case of the Viper from the death of the North of Australia). It is not known why the snake tail spider has evolved into something so elaborate when lure worm work very well.
Posted on: Fri, 18 Oct 2013 02:52:03 +0000
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